A Novel Method for Secure Key-Sharing in 5G and
Beyond

A Novel Method for Secure Key-Sharing in 5G and
Beyond

Cryptography; Symmetric key cryptography;
Asymmetric key cryptography; Key sharing

In today’s world, online communication is essential, and
infrastructure for cutting-edge mobile technologies like 5G, is
growing daily to meet the demand. So, information sharing
security needs to be safeguarded as electronic communications
spread. To implement this, cryptography is typically used, and
most commonly symmetric key cryptography, due to its many
advantages over other crypto-systems. However, one significant
disadvantage of symmetric key system is that the single-keysharing is exposed to all entities in a network communication
system, which makes the subsequent communications vulnerable
to unauthorized access. There are many approaches for securing
the single-key-sharing transmission, but each has its own
drawbacks. In this paper, we propose and present a novel
approach to secure key-sharing over a communication network in
symmetric key cryptography system which makes the single-key
immune to unauthorized access. A total of four messages are
exchanged between two devices for our secure key-sharing
method. To implement the key sharing process, our method
employs a few techniques, including asymmetric key
cryptography, hash functions, machine learning-based pseudo
random number generators, and timers. Our analysis shows that,
besides providing similar level of confidentiality as the existing
approaches, it also provides other significant improvements over
the current ones, such as enhanced integrity maintenance, and
authenticity verification of the two devices involved in the process.
The short latency of modern 5G networks helps to balance the
increased network demand caused by sending four independent
messages. To determine timer duration and key validity, we
propose applying AI algorithms and extending the security of our
method; nevertheless, these applications fall within the purview of
our upcoming study.

Debjyoti Bagchi

https://ijcit.com/index.php/ijcit/article/view/501

Computer Science and Engineering
Calcutta Institute of Engineering and
Management
Kolkata, West Bengal, India

june 2025

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